The Open Crystallography Journal

2011, 4 : 25-29
Published online 2011 March 10. DOI: 10.2174/1874846501104010025
Publisher ID: TOCRYJ-4-25

Some Factors and Effects on Thermally Structural Changes of Lattice for Cyanide-Bridged Bimetallic Assemblies of Cu(II)

Takashiro Akitsu , Mao Ohwa , Yuki Endo , Satoru Sonoki , Yoshikazu Aritake and Yusuke Kimoto
Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjukuku, Tokyo 162-8601, Japan.

ABSTRACT

In order to understand novel structural features of crystal packing of [CuL2][Ni(CN)4]·2H2O (L = (1R,2R)-1,2- diaminocyclohexane), we have investigated temperature effect, metal-size effect, and isotope effect and their temperature dependence (100-300 K) with synchrotron powder X-ray diffraction (XRD) for (1) [CuL2][M(CN)4]·2H2O (M=Pd, Pt), (2) [CuL’2][M(CN)4] (M=Ni, Pd, and Pt; L’ = N-ethylethylenediamine), and (3) [CuL’’2][M(CN)6]·nH2O (L’’ =(1S,2S)-1,2- dimethylcyclohexanediamine. M=Cr, Co, and Fe; isotopes of H2O are 1H(H), 2H(D), and 18O(O), respectively). The effect of the factors of (1) (temperature difference of 200 K) is comparable to metal size for the system of (1). Combinatorial preparation of (2) gave rise to the most stable Pd(II) complexes predominantly. Isotope effect of water molecules resulted in little structural changes of lattice for (3).